From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757809AbZBSDIU (ORCPT ); Wed, 18 Feb 2009 22:08:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758650AbZBSDH7 (ORCPT ); Wed, 18 Feb 2009 22:07:59 -0500 Received: from e4.ny.us.ibm.com ([32.97.182.144]:33405 "EHLO e4.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758210AbZBSDH5 (ORCPT ); Wed, 18 Feb 2009 22:07:57 -0500 Date: Wed, 18 Feb 2009 19:07:43 -0800 From: Sukadev Bhattiprolu To: Andrew Morton Cc: Oleg Nesterov , roland@redhat.com, "Eric W. Biederman" , daniel@hozac.com, Containers , linux-kernel@vger.kernel.org Subject: [PATCH 7/7][v8] SI_USER: Masquerade si_pid when crossing pid ns boundary Message-ID: <20090219030743.GG18990@us.ibm.com> References: <20090219030207.GA18783@us.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090219030207.GA18783@us.ibm.com> X-Operating-System: Linux 2.0.32 on an i486 User-Agent: Mutt/1.5.15+20070412 (2007-04-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sukadev Bhattiprolu Date: Wed, 24 Dec 2008 14:14:18 -0800 Subject: [PATCH 7/7][v8] SI_USER: Masquerade si_pid when crossing pid ns boundary When sending a signal to a descendant namespace, set ->si_pid to 0 since the sender does not have a pid in the receiver's namespace. Note: - If rt_sigqueueinfo() sets si_code to SI_USER when sending a signal across a pid namespace boundary, the value in ->si_pid will be cleared to 0. Changelog[v5]: - (Oleg Nesterov) Address both sys_kill() and sys_tkill() cases in send_signal() to simplify code (this drops patch 7/7 from earlier version of patchset). Signed-off-by: Sukadev Bhattiprolu --- kernel/signal.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/kernel/signal.c b/kernel/signal.c index c94355b..a416d77 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -883,6 +883,8 @@ static int __send_signal(int sig, struct siginfo *info, struct task_struct *t, break; default: copy_siginfo(&q->info, info); + if (from_ancestor_ns) + q->info.si_pid = 0; break; } } else if (!is_si_special(info)) { -- 1.5.2.5